12321530 has 16 divisors (see below), whose sum is σ = 23885064. Its totient is φ = 4549440.

The previous prime is 12321511. The next prime is 12321541. The reversal of 12321530 is 3512321.

12321530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6056521 + 6265009 = 2461^2 + 2503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12321499 and 12321508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47261 + ... + 47520.

Almost surely, 2^12321530 is an apocalyptic number.

12321530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12321530 is a deficient number, since it is larger than the sum of its proper divisors (11563534).

12321530 is a wasteful number, since it uses less digits than its factorization.

12321530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94801.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12321530 is about 3510.2036977930. The cubic root of 12321530 is about 230.9696305096.

Adding to 12321530 its reverse (3512321), we get a palindrome (15833851).

The spelling of 12321530 in words is "twelve million, three hundred twenty-one thousand, five hundred thirty".